Invention Publication
EP2961073A1 COLUMN-TWIST INTERLEAVING FOR LDPC CODES IN COMBINATION WITH 64K QAM
审中-公开
圆柱形交叉切片FKR LDPC KODES IN KOMBINATION MIT 64K QAM
- Patent Title: COLUMN-TWIST INTERLEAVING FOR LDPC CODES IN COMBINATION WITH 64K QAM
- Patent Title (中): 圆柱形交叉切片FKR LDPC KODES IN KOMBINATION MIT 64K QAM
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Application No.: EP15177576.4Application Date: 2008-11-26
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Publication No.: EP2961073A1Publication Date: 2015-12-30
- Inventor: Yokokawa, Takashi , Yamamoto, Makiko , Okada, Satoshi , Sakai, Lui , Ikegaya, Ryoji
- Applicant: Sony Corporation
- Applicant Address: 1-7-1 Konan Minato-ku Tokyo 108-0075 JP
- Assignee: Sony Corporation
- Current Assignee: Sony Corporation
- Current Assignee Address: 1-7-1 Konan Minato-ku Tokyo 108-0075 JP
- Agency: D Young & Co LLP
- Priority: JP2007304690 20071126; JP2008070467 20080318; JP2008259466 20081006
- Main IPC: H03M13/11
- IPC: H03M13/11 ; H03M13/27 ; H03M13/25 ; H04L1/00
Abstract:
The present invention relates to column-twist interleaving (24) for LDPC bit interleaved coded modulation in the DVB framework. More specifically, the present invention is directed to a row-column interleaver comprising mb columns and N/mb rows, in which N LDPC code bits are written column-by-column into the interleaver and read row-by-row from the interleaver. For each column, writing may not start at the top of the column but with an offset. The mb code bits of a row are mapped to b symbols of a 2 m QAM signal constellation. Column offset parameters are provided for LDPC codes of length 64800, b=1,2 and m=16 (i.e. 64 kQAM).
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